add mutex fpr httpAPI start

nucleus/controller.go

@@ -47,7 +47,8 @@ func initialize() error {
 	}
 
 	// TODO: Start grpc listener here
-
+	coreLock.Lock()
+	defer coreLock.Unlock()
 	return httpAPI()
 }
 
@@ -76,11 +77,9 @@ func createPrincipalNetworkDomain(sbi SouthboundInterface) error {
 // Run calls initialize to start the controller
 func Run(ctx context.Context) error {
 	var initError error
-	coreLock.Lock()
 	coreOnce.Do(func() {
 		initError = initialize()
 	})
-	coreLock.Unlock()
 	if initError != nil {
 		log.WithFields(log.Fields{}).Error(initError)
 		return initError

nucleus/http_test.go

@@ -137,10 +137,12 @@ func Test_httpApi(t *testing.T) {
 			wantErr: false,
 		},
 	}
+	coreLock.Lock()
 	if err := httpAPI(); err != nil {
 		t.Errorf("httpApi() error = %v", err)
 		return
 	}
+	coreLock.Unlock()
 	for _, tt := range tests {
 		t.Run(tt.name, func(t *testing.T) {
 			got, err := http.Get(tt.request)